Sunk Cost Fallacy in Derivatives

The sunk cost fallacy occurs when a trader continues to hold a losing options position or a depreciating crypto asset solely because they have already invested significant capital or effort into it. Instead of evaluating the position based on current market microstructure and future outlook, the trader focuses on the past cost.

In derivatives trading, this often leads to the refusal to close a losing trade, hoping for a reversal that may never come, or doubling down on a bad position to lower the average cost. This behavior prevents the objective liquidation of losing trades, which is essential for preserving capital.

It is a primary driver of catastrophic losses in leveraged accounts. The market does not care about the entry price, only the current price and future probability distribution.

Failing to ignore sunk costs leads to emotional attachment to losing trades. It is a critical error in systematic trading strategies.